16 lines
549 B
JavaScript
16 lines
549 B
JavaScript
|
'use strict';
|
||
|
|
var $ = require('../internals/export');
|
||
|
|
var sameValueZero = require('../internals/same-value-zero');
|
||
|
|
var aMap = require('../internals/a-map');
|
||
|
|
var iterate = require('../internals/map-iterate');
|
||
|
|
|
||
|
|
// `Map.prototype.includes` method
|
||
|
|
// https://github.com/tc39/proposal-collection-methods
|
||
|
|
$({ target: 'Map', proto: true, real: true, forced: true }, {
|
||
|
|
includes: function includes(searchElement) {
|
||
|
|
return iterate(aMap(this), function (value) {
|
||
|
|
if (sameValueZero(value, searchElement)) return true;
|
||
|
|
}, true) === true;
|
||
|
|
}
|
||
|
|
});
|